Economic Application of Tapless Distribution Transformers on a Major Utility System

Economic aspects of the successful application of tapless distribution transformers are developed for the Southern California Edison Company´s 12-kv system. Procedures in converting from tapped transformers to tapless transformers and capacitors, changes in operating policies, analysis of voltage quality, and development of the approximate $4,900,000 10-year savings are included. Actual operating results from one large service area are presented and confirm the practicability of tapless distribution transformers thus making the predicted savings possible.